SPECTROPHOTOMETRIC DETERMINATION OF COBALT (II) IN A LIQUID-LIQUID EXTRACTION SYSTEM CONTAINING 2- HYDROXY-5-IODOTHIOPHENOL AND DIPHENYLGUANIDINE

  • A Z Zalov Azerbaijan State Pedagogical University
  • G I Amanullayeva Azerbaijan State University of Oil and industrial
DOI: https://doi.org/10.53555/as.v2i7.1273
Keywords: cobalt(II),, 2-hydroxy-5-iodothiophenol, ternary complex, solvent extraction.

Abstract

The complex formation and a liquid-liquid extraction in the cobalt(II) - 2-hydroxy-5-iodothiophenol
(HITP) - diphenylguanidine (DPG) - water - chloroform system was studied. The optimum extractionspectrophotometric
conditions were found. The molar ratio of the reacting species was determined to be
1:2:2 (Co:HITP:DPG). The following equilibrium processes were quantitatively examined: the association
between the anionic chelate, [Co(HITP)2]
2–
, and the diphenylguanidine (lgβ =8.7); the distribution of the
ternary complex between the aqueous and organic phases (logKD=1.86); and the extraction from water to
chloroform (lgKex=lgβ +lgKD=10.56). The effect of foreign ions and reagents on the extraction was
studied. A sensitive (ε590 = 3.3×104 L mol–1 cm–1
) and simple extraction-spectrophotometric procedure for
cobalt determination was developed.

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Author Biographies

A Z Zalov, Azerbaijan State Pedagogical University

Department of Chemistry, Azerbaijan State Pedagogical University, st. U. Gadjibekov
68. Baku, AZ 1000, Azerbaijan

G I Amanullayeva, Azerbaijan State University of Oil and industrial

Department of General Chemistry Chemistry, Azerbaijan State University of Oil and industrial, st.
Azadlg 34, Baku, 1000 Azebaijan

Published
2016-07-31
How to Cite
Zalov, A. Z., & Amanullayeva, G. I. (2016). SPECTROPHOTOMETRIC DETERMINATION OF COBALT (II) IN A LIQUID-LIQUID EXTRACTION SYSTEM CONTAINING 2- HYDROXY-5-IODOTHIOPHENOL AND DIPHENYLGUANIDINE. IJRDO-Journal of Applied Science, 2(7), 17-25. https://doi.org/10.53555/as.v2i7.1273
Issue
Vol. 2 No. 7 (2016): IJRDO - Journal of Applied Science
Section
Articles

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